JP5149419B2 - Thin display device - Google Patents

Abstract

Provided is a technique related to a thin display device having a frame structure in which accuracy is ensured. First and second restricting projections (84, 85) are formed on the inner parts of a bending hole (83). The restricting surface (84a), which is the end section of the first restricting projection (84), is formed at an angle of 45 degrees sloping from the upper left to the lower right. The restricting surface (85a), which is the end section of the second restricting projection (85), is formed at an angle of 45 degrees sloping from the upper right to the lower left. When a bending process is performed, the restricting surface (84a) of the first restricting projection (84) abuts against the restricting surface (85a) of the second restricting projection (85).

Description

  The present invention relates to a thin display device, for example, a thin display device suitable for a liquid crystal television or a tablet display device.

  In recent years, televisions have become thinner and lighter, and a plurality of relatively light-weight types such as a 20-inch type have been released. The portable type is required to be thinner and lighter than the stationary type, and since a more stylish shape is required, a narrow frame is also required.

  For example, there is a technique for providing a molding method that can easily and accurately mold an exterior cabinet for a thin display device (see Patent Document 1). In this technique, a metal workpiece in which portions corresponding to the frame portion and the cover portion of the exterior cabinet are formed along the longitudinal direction is cut into a predetermined length. And the several part of the part corresponding to the cover part of the cut | disconnected workpiece material is cut | disconnected, and a V-shaped notch is formed. A frame-shaped exterior cabinet is formed by bending the portion facing the notch.

JP 2010-266623 A

  By the way, in general, a liquid crystal television has a structure in which an optical member such as a panel or an optical sheet is fixed by wrapping a metal square frame called a bezel and covered with a cabinet in many cases. However, in order to realize a thin, light, and narrow frame as described above, a structure that does not depend on the frame structure of the bezel as described above has been required.

  In addition, in a portable, relatively small TV, the corners of the four corners of the product may be rounded to some extent due to the design. A device to ensure roundness was necessary. In portable TVs, there are cases where a protective cover is attached to the surface in order to prevent breakage of the panel, and there has been a demand for a device that prevents a gap when the protective cover is attached to the frame.

  With the technique disclosed in Patent Document 1, a cutout can be made in an extruded molded product to create a television frame. However, there is a problem that the bending angle cannot be secured while the predetermined bending R is made in the bent portion, and another technique is required.

  This invention is made | formed in view of the above situations, Comprising: It aims at providing the technique which solves the said subject.

A thin display device according to the present invention is a thin display device comprising a metal frame, a protective panel arranged on the front side of the frame frame, and a rear cabinet arranged on the back side of the frame frame. The frame frame is configured by joining a plurality of bent frame members, and the bent portion includes a bent hole portion for bending and is spaced apart before processing and is mutually connected during processing. Is formed with two restricting means for restricting the amount of bending to a predetermined amount, and the hole for bending has a substantially inverted trapezoidal shape before bending. The upper side of the inverted trapezoid is in a state where a part of the bent portion is separated .
The bent hole portion is set so that the length of the lower side of the substantially inverted trapezoid is the same as or slightly longer than the length corresponding to the portion to be bent, and before the processing of the two restricting means. A separated state may be formed.
In addition, the state where a part of the part to be bent is separated may be a state where the parts are separated in a V-cut shape.
Moreover, you may provide the coupling member which couple | bonds these frame members and comprises the said frame.
The coupling member and the frame member may be screw-fixed at a plurality of points, and offsets may be set in the corresponding screw holes.

  ADVANTAGE OF THE INVENTION According to this invention, the technique regarding the thin display apparatus which has a frame structure which ensured the precision can be provided.

It is the top view and side view which show the external appearance of the liquid crystal television based on embodiment. It is a disassembled perspective view which shows the external appearance of the liquid crystal television based on embodiment. It is the top view and side view of a frame which concern on embodiment. It is the top view and side view of a frame of a separation state concerning an embodiment. It is a rear view of the frame based on Embodiment. It is a perspective view of a corner part of a frame concerning an embodiment. It is the detailed top view and sectional drawing of the corner part of a frame based on embodiment. It is a figure of the back side of the corner | angular part of a flame | frame based on embodiment. It is the rear view and sectional drawing of a flame | frame and coupling member which concern on this embodiment. It is a top view of the corner part of a frame concerning the modification of this embodiment. It is a top view of the corner part of a frame concerning the modification of this embodiment. It is a perspective view of the corner part of the frame based on the modification of this embodiment.

  Next, embodiments for carrying out the present invention will be specifically described with reference to the drawings. In the following, a liquid crystal television is exemplified as a thin display device, but naturally, it can also be applied to a liquid crystal monitor and a mobile terminal (a mobile phone or a tablet display device).

The outline of the point of this embodiment is as follows.
(1) Cut out a plurality of portions corresponding to the cover portion of the metal workpiece. A portion corresponding to the frame portion of the notched portion is bent, and a frame-shaped exterior cabinet (frame) is formed using the bent processed material. In the cutout portion, the portion close to the bend is shaped like a wide hole, and the portion far from the bend is in close contact when the bend is completed, and the bend angle is precisely regulated.
(2) Predetermined meat with a step is piled up in a portion close to bending.
(3) There are two bent portions for one member.
(4) The members are connected through the connecting member.

  FIG. 1 is a diagram illustrating an appearance of a liquid crystal television 10 according to the present embodiment. FIG. 2 is an exploded perspective view of the liquid crystal television 10. The liquid crystal television 10 includes a frame-like frame 20 that is an exterior side cabinet, a front transparent protective cover 30, and a rear rear cabinet 40 as exteriors. A front cabinet 35, a sheet group 50, and a backlight chassis 60 are disposed inside the exteriors from the transparent protective cover 30 side.

  The frame 20 is a molded part made of a metal processing member (processing an extruded material or a drawn material). Although the detailed structure will be described later, for example, in the case of the 20 inch class, the approximate size is about 490 mm wide × about 290 mm high.

  The transparent protective cover 30 is a glass plate, for example, and protects the sheet group 50. The rear cabinet 40 is formed of a resin material.

  The front cabinet frame 35 is formed of a resin material in the same size and shape as the frame 20 and is attached to the back side of the frame 20. The frame 20 is formed with a cylindrical positioning projection 25 extending in the rearward direction at a predetermined position. Corresponding to the positioning protrusions 25, positioning boss holes 37 are provided on the front side of the front cabinet frame 35. Further, at the four corners on the front surface side (the frame 20 side) of the front cabinet frame 35, fitting convex portions 39 that fit into bending hole portions 83 of the frame 20 described later are provided.

  In the sheet group 50, a liquid crystal panel 51, a Df sheet 52, a lens sheet 53, a light guide plate 54, a diffusion sheet 55, and a reflection plate 56 are arranged in a laminated form from the front side.

  The backlight chassis 60 is obtained by processing a metal plate into a predetermined shape, and includes a light source (for example, LED edge light), a video drive circuit, a battery, and the like (not shown).

Next, the frame 20 that is characteristic of the present embodiment will be described in detail.
3 and 4 show a plan view (FIG. 3 (a), FIG. 4 (a)) and a side view (FIG. 3 (b), FIG. 4 (b)) of the frame 20. FIG. FIG. 4 shows the frame 20 in a separated state. FIG. 5 is a rear view of the frame 20.

  As illustrated, the frame 20 includes a first frame 70 and a second frame 80, and is coupled by a coupling member 90. Specifically, the upper first frame 70 and the lower second frame 80 are integrally coupled by the coupling member 90 at two locations on both side surfaces of the back surface portion.

  The first frame 70 and the second frame 80 are each formed from an extruded member (or a drawer member) such as an aluminum alloy or stainless steel. Specifically, the extruded material frame 20 having a predetermined cross-sectional shape is processed into a predetermined notch shape so that a portion corresponding to the four corners (hereinafter referred to as a corner portion) can be bent, It is bent at R.

  FIG. 6 shows an enlarged perspective view of the corner portion. Since the four corners have the same shape, the bent portion of the first frame 70 and the bent portion of the second frame 80 have substantially the same shape, and the following mainly represents the second frame 80 unless otherwise specified. explain. FIG. 7A shows a state before the corner portion is bent, and FIG. 7B shows a state of the corner portion after the processing. FIG. 7C is a sectional view taken along line XX in FIG. 7A, and FIG. 7D is a sectional view taken along line YY in FIG.

  In the second frame 80, first, an extruded material of aluminum alloy is cut into a predetermined length according to the size of the liquid crystal television 10. The cross-sectional shape is a protective cover placement portion 87 (the front portion of the base portion 81 and the side portion 82) where the transparent protective cover 30 is placed, and an outer periphery that protrudes one step higher than the protective cover placement portion 87 at the outer peripheral portion. The projection 86 includes a frame side surface 88 exposed as a side surface of the liquid crystal television 10. In other words, it is not an L-shape but a T-shape (a state in which it is laid down). The outer peripheral projection 86 is set according to the thickness of the transparent protective cover 30 and has a height of about 1.5 mm, for example.

  Subsequently, the second frame 80 is formed with a shape corresponding to a corner portion (a bent hole portion 83 and first and second restricting convex portions 84 and 85 described later) and a frame-side screw hole 99. In the state before the bending process in FIG. 7A, the bending hole 83 has a substantially inverted trapezoidal shape. The height of the inverted trapezoid (the distance from the light leakage preventing meat portion 88a to the first and second restricting convex portions 84, 85) is about 10 mm. Furthermore, the length L of the lower side of the inverted trapezoid is set to be the same as (or slightly longer than) the length corresponding to R of the bent portion. This is to enable a proper and easy bending process.

  Further, when the transparent protective cover 30 is disposed in the cut-out bent hole 83, in order to prevent light leakage inside the liquid crystal television 10, the light leakage preventing meat portion 88a left unprocessed by a predetermined size is provided. Is provided. After the second frame 80 is bent, the left side portion of the bending hole portion 83 becomes the bottom front surface portion 81 extending left and right, and the right side portion becomes the side portion 82 extending vertically.

  Furthermore, the 1st control convex part 84 and the 2nd control convex part 85 are formed in the inner part (upper part of Fig.7 (a)) of the bending hole part 83. FIG. Specifically, the first restricting convex portion 84 extends from the bottom front surface portion 81 toward the bending hole portion 83. Similarly, the second restricting convex portion 85 extends from the side portion 82 toward the bending hole portion 83. At this time, the restricting surface 84a that is the end of the first restricting convex portion 84 has an angle of 45 degrees from the upper left to the lower right. The restriction surface 85a that is the end of the second restriction convex portion 85 has an angle of 45 degrees obliquely from the upper right to the lower left. That is, the tip of the V-cut shape is a large hole (bending hole 83). The front cabinet frame 35 has a convex fitting size that is substantially the same as the shape of the bending hole 83 at the position corresponding to the bending hole 83, that is, at the four corners on the front side. A convex portion 39 is formed. The height of the fitting convex portion 39 is set to be lower than the upper surface of the frame 20 (the surface of the protective cover placement portion 87) when fitted. This configuration also ensures positioning and prevention of misalignment.

  Then, as shown in FIG. 7B, the restriction surface 84 a of the first restriction protrusion 84 and the restriction surface 85 a of the second restriction protrusion 85 come into contact with each other when bent. By this contact, the bottom front surface part 81 and the side part 82 become a right angle, and no further bending occurs. That is, the bending process can be performed with high accuracy, and no distortion occurs even after the first frame 70 and the second frame 80 are assembled.

  FIG. 8 and FIG. 9 show the details of the assembled portion of the first frame 70 and the second frame 80. The first frame 70 and the second frame 80 are coupled by a coupling member 90 at their back portions. A total of four frame side screw holes 79a, 79b, 89a, 89b are formed in the side part 72 of the first frame 70 and the side part 82 of the second frame 80, respectively. When the two frame side screw holes 79a and 79b are not distinguished from each other, they are simply referred to as frame side screw holes 79. Similarly, when the two frame side screw holes 89a and 89b are not distinguished, they are simply referred to as frame side screw holes 89. The frame side screw holes 79a, 79b, 89a, 89b have a partially conical shape corresponding to the countersunk head screw 99.

  The coupling member 90 is, for example, a material obtained by processing an aluminum alloy plate or the like, and has a total of four coupling member side screw holes 92a and 92b at positions corresponding to the frame side screw holes 79 and 89 (unless particularly distinguished from each other). Simply referred to as a connecting member side screw hole 92). Here, as shown in FIG. 9A, the inner two connecting member side screw holes 92a are set with an offset ΔX so as to be slightly closer to the frame side screw holes 79a and 89a in the vertical direction in the figure. Yes. The offset ΔX is, for example, about 0.05 mm to 0.10 mm. Further, as shown in FIG. 9B, the frame side screw holes 79 (79a, 79b), 89 (89a, 89b) and the coupling member side screw holes 92 are also provided with a predetermined offset in the width direction. ΔY is set, and a force acts in a direction in which the coupling member 90 is pressed against the side portion 82 of the second frame 80.

  Therefore, when the first frame 70 and the second frame 80 are fastened by the coupling member 90, the first frame 70 and the second frame 80 are brought closer to each other by the offsets ΔX and ΔY. The force acts on. Therefore, it is possible to correct the state in which each end portion of the first frame 70 and the second frame 80 is bent in the opening direction by the restoring force, and to maintain the assembled state of the frame 20 appropriately. Can do.

The summary of the effects of the present embodiment is summarized as follows.
A predetermined R can be easily generated at the bent portion of the frame 20 and can be accurately adjusted to a predetermined bending angle. Further, when the transparent protective cover 30 is attached directly on the frame 20, there is no gap between the transparent protective cover 30 and the frame 20 so that the inside can be visually recognized by the thick portion (light leakage prevention meat portion 88a) of the corner portion, The parts under the frame 20 are not visible. That is, it can be blinded without using additional components other than the frame 20. When the frame 20 is created, the structure is such that two substantially symmetrical members are fixed, so that the force applied to the four corners is equalized. As a result, the deformation of the product can be reduced. The accuracy of the square frame can be ensured by adjusting the connecting member 90 of the connecting portion.

  The present invention has been described based on the embodiments. This embodiment is an exemplification, and it will be understood by those skilled in the art that various modifications can be made to combinations of these components, and such modifications are also within the scope of the present invention.

  FIG. 10 shows a plan view of the corner portion of the second frame 80 according to the modification. Specifically, FIG. 10A shows a state before the corner portion is bent, and FIG. ) Shows the state of the corner after processing. As shown in the figure, a fitting convex portion 84 b is formed on the regulating surface 84 a of the first regulating convex portion 84. Further, a fitting recess 85 b is formed on the restriction surface 85 a of the second restriction convex portion 85. When bent, the fitting convex portion 84b and the fitting concave portion 85b are configured to just fit. Furthermore, in order to maintain the fitting state, a locking piece is formed on the fitting convex portion 84b, and a locking concave portion that locks the locking piece is formed on the fitting concave portion 85b. Here, as shown in the figure, the locking piece has a semicircular convex shape in plan view, and the locking concave portion has a semicircular concave shape.

  As described above, the first restricting convex portion 84 and the second restricting convex portion 85 have a function of locking when the first restricting convex portion 84 and the second restricting convex portion 85 are bent. It is possible to add a force (a restoring force) against a restoring force acting on each bent portion of the frame 80. As a result, the structure that resists the restoring force by the coupling member 90 can be reduced, and the degree of freedom in component placement is improved. Moreover, the precision of bending process of the 2nd flame | frame 80 grade | etc., Can be improved by the fitting of the fitting convex part 84b and the fitting recessed part 85b. Further, when an external force is applied to the second frame 80 by the fitting, the processed shape can be properly maintained.

  In addition, as shown in FIG. 11, the structure which does not have a locking piece or a locking recessed part may be employ | adopted. In Fig.11 (a), the fitting convex part 84c and the fitting recessed part 85c are made into semicircle shape. In FIG.11 (b), the fitting convex part 84d and the fitting recessed part 85d are made into the rectangular shape. In FIG. 11C, a plurality of rectangular fitting convex portions 84e and fitting concave portions 85e are arranged. Since there is no locking structure, the restoring force is smaller than the structure shown in FIG. 10, but a constant restoring force can be obtained by the frictional force. Moreover, if it is these structures, the force fitted at the time of a bending process can be made small.

  FIG. 12 is a perspective view of a modified example of the corner portion of the second frame 80, showing a modified example of the fitting structure of the bent hole portion 83 and the fitting convex portion 39 shown in FIG. Specifically, in the front cabinet frame 35, two columnar positioning convex portions 39a and 39b are formed instead of the fitting convex portion 39. These positioning protrusions 39a and 39b are inserted in the vicinity of both sides of the bending hole 83. Therefore, the central part of the bending hole 83 is vacant. And the positioning convex part 31 formed in the corner back part of the transparent protective cover 30 arrange | positioned in the front side of the flame | frame 20 (2nd frame 80) is inserted in the vacant part. That is, the two positioning projections 39a and 39b of the front cabinet frame 35 are inserted into the bending hole 83 from the back side, and the positioning projection 31 of the transparent protective cover 30 is inserted from the front side. By setting it as such a structure, the effect of positioning of the transparent protective cover 30 and a shift prevention is also acquired.

10 LCD TV 20 Frame 25 Positioning Projection 25
30 Transparent protective cover 31 Positioning convex part 35 Front cabinet frame 37 Positioning boss hole 37
39 fitting convex portions 39a, 39b positioning convex portion 40 rear cabinet 50 sheet group 51 liquid crystal panel 52 Df sheet 53 lens sheet 54 light guide plate 55 diffusion sheet 56 reflecting plate 60 backlight chassis 70 first frame 79, 89, 79a, 79b, 89a, 89b Frame side screw hole 80 Second frame 81 Bottom front surface portion 82 Side portion 83 Bending hole portion 84 First restriction convex portion 84a Restriction surfaces 84b to 84e Fitting convex portion 85 For second restriction Protruding portion 85a Restricting surface 85b Locking recessed portion 85b to 85e Fitting recessed portion 86 Outer peripheral protrusion 87 Protective cover placement portion 88 Frame side surface portion 88a Light leakage prevention meat portion 90 Coupling member 92, 92a, 92b Coupling member side screw hole 99 Countersunk head screw

Claims (5)

A thin display device comprising a metal frame, a protective panel arranged on the front side of the frame, and a rear cabinet arranged on the back side of the frame,
The frame frame is configured by combining a plurality of bent frame members,
The bent portion is formed with a bending hole portion for bending and two regulating means for regulating the amount of the bending to a predetermined amount by separating them before processing and contacting each other at the time of processing. And
The bending hole portion has a substantially inverted trapezoidal shape before bending, and the upper side of the inverted trapezoid is in a state in which a part of the bent portion is separated. A thin display device. The bent hole portion is set so that the length of the lower side of the substantially inverted trapezoid is the same as or slightly longer than the length corresponding to the portion to be bent, and the two regulating means are separated before processing. thin display device according to claim 1, characterized in that There are formed. 3. The thin display device according to claim 2 , wherein the part of the part to be bent is separated in a V-cut shape. .   The thin display device according to claim 1, further comprising a coupling member that couples the plurality of frame members to form the frame frame.   The thin display device according to claim 4, wherein the coupling member and the frame member are screw-fixed at a plurality of points, and offsets are set in the corresponding screw holes.

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